Switch on null-aware operators by default in analyzer.

pkg/analyzer/lib/src/generated/html.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.html;
 
 import 'dart:collection';
@@ skipping 398 matching lines @@
       List<XmlTagNode> tagNodes, Token contentEnd, Token closingTag,
       Token nodeEnd) {
     if (_isScriptNode(tag, attributes, tagNodes)) {
       HtmlScriptTagNode tagNode = new HtmlScriptTagNode(nodeStart, tag,
           attributes, attributeEnd, tagNodes, contentEnd, closingTag, nodeEnd);
       String contents = tagNode.content;
       int contentOffset = attributeEnd.end;
       LineInfo_Location location = _lineInfo.getLocation(contentOffset);
       sc.Scanner scanner = new sc.Scanner(source,
           new sc.SubSequenceReader(contents, contentOffset), _errorListener);
-      scanner.enableNullAwareOperators = _options.enableNullAwareOperators;
       scanner.setSourceStart(location.lineNumber, location.columnNumber);
       sc.Token firstToken = scanner.tokenize();
       Parser parser = new Parser(source, _errorListener);
       CompilationUnit unit = parser.parseCompilationUnit(firstToken);
       unit.lineInfo = _lineInfo;
       tagNode.script = unit;
       return tagNode;
     }
     return new XmlTagNode(nodeStart, tag, attributes, attributeEnd, tagNodes,
         contentEnd, closingTag, nodeEnd);
@@ skipping 1452 matching lines @@
  */
 abstract class XmlVisitor<R> {
   R visitHtmlScriptTagNode(HtmlScriptTagNode node);
 
   R visitHtmlUnit(HtmlUnit htmlUnit);
 
   R visitXmlAttributeNode(XmlAttributeNode xmlAttributeNode);
 
   R visitXmlTagNode(XmlTagNode xmlTagNode);
 }